/* ==========================================================================
   OFFLINE GAMIFIED CLASSROOM MANAGEMENT - MAIN STYLES
   Vibrant, high-energy aesthetic combining ClassDojo rewards + Kahoot/Wayground game-show feel.
   100% Offline, zero external dependencies.
   ========================================================================== */

:root {
  /* Brand Game Colors */
  --primary: #4F46E5;        /* Playful Indigo */
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  --secondary: #7C3AED;      /* Electric Violet */
  --secondary-light: #F5F3FF;
  --accent-pink: #F43F5E;    /* Energetic Coral/Rose */
  --accent-orange: #F97316;  /* Punchy Orange */
  --accent-yellow: #FBBF24;  /* Star Gold */
  --accent-yellow-dark: #D97706;
  --accent-green: #10B981;   /* Level-up Emerald */
  --accent-teal: #0D9488;    /* Wayground Teal */
  --accent-blue: #0284C7;    /* Sky Blue */

  /* Neutral Surface Colors */
  --bg-app: #F8FAFC;         /* Soft Cloud White */
  --bg-card: #FFFFFF;
  --bg-card-alt: #F1F5F9;
  --bg-dark: #0F172A;        /* Deep Space Game Canvas */
  --bg-dark-card: #1E293B;

  /* Typography Colors */
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --text-white: #FFFFFF;

  /* Borders & Shadows */
  --border-light: #E2E8F0;
  --border-focus: #818CF8;
  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
  --shadow-game: 0 6px 0 rgba(0, 0, 0, 0.15);
  --shadow-btn-primary: 0 5px 0 #3730A3;
  --shadow-btn-green: 0 5px 0 #059669;
  --shadow-btn-orange: 0 5px 0 #C2410C;
  --shadow-btn-pink: 0 5px 0 #BE123C;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* System Font Stack with Friendly Fallbacks */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Comic Neue', 'Fredoka', 'Quicksand', sans-serif;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  width: 100%;
  max-width: 1380px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem 1.25rem;
  flex: 1;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
p { color: var(--text-muted); }

/* Game Badge / Pill */
.game-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-green { background: #DCFCE7; color: #166534; }
.badge-orange { background: #FFEDD5; color: #9A3412; }
.badge-yellow { background: #FEF3C7; color: #92400E; }
.badge-pink { background: #FFE4E6; color: #9F1239; }
.badge-teal { background: #CCFBF1; color: #115E59; }

/* Tactile 3D Game Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  text-decoration: none;
  position: relative;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(3px);
}

.btn:disabled,
.btn[disabled],
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed !important;
  pointer-events: auto !important;
  box-shadow: none !important;
  transform: none !important;
  filter: grayscale(0.5);
}

.btn-primary {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: var(--shadow-btn-primary);
}
.btn-primary:hover {
  background: var(--primary-hover);
}
.btn-primary:active {
  box-shadow: 0 2px 0 #3730A3;
}

.btn-success {
  background: var(--accent-green);
  color: var(--text-white);
  box-shadow: var(--shadow-btn-green);
}
.btn-success:hover {
  background: #059669;
}
.btn-success:active {
  box-shadow: 0 2px 0 #059669;
}

.btn-accent {
  background: var(--accent-orange);
  color: var(--text-white);
  box-shadow: var(--shadow-btn-orange);
}
.btn-accent:hover {
  background: #EA580C;
}
.btn-accent:active {
  box-shadow: 0 2px 0 #C2410C;
}

.btn-pink {
  background: var(--accent-pink);
  color: var(--text-white);
  box-shadow: var(--shadow-btn-pink);
}
.btn-pink:hover {
  background: #E11D48;
}
.btn-pink:active {
  box-shadow: 0 2px 0 #BE123C;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 2px solid var(--border-light);
  box-shadow: 0 4px 0 var(--border-light);
}
.btn-secondary:hover {
  background: var(--bg-card-alt);
  border-color: #CBD5E1;
}
.btn-secondary:active {
  box-shadow: 0 1px 0 var(--border-light);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-icon {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* Card Styling */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
}

.card-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Form Controls */
.form-group {
  margin-bottom: 1.2rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  color: var(--text-main);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
}

/* Number Stepper (+ / - input) */
.stepper-control {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card-alt);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  border: 2px solid var(--border-light);
}

.stepper-btn {
  width: 34px;
  height: 34px;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  box-shadow: var(--shadow-sm);
}

.stepper-btn:hover {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
}

.stepper-value {
  padding: 0 0.85rem;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary);
  min-width: 45px;
  text-align: center;
}

/* Toggle Switch */
.toggle-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  background: #CBD5E1;
  border-radius: 999px;
  transition: background-color 0.2s ease;
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background: #FFFFFF;
  border-radius: 50%;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input[type="checkbox"]:checked + .toggle-switch {
  background: var(--accent-green);
}

input[type="checkbox"]:checked + .toggle-switch::after {
  transform: translateX(22px);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  padding: 1.5rem;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.92) translateY(10px);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-backdrop.active .modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Toast Notification */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #FFFFFF;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 6px solid var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  animation: toastSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  min-width: 280px;
  max-width: 400px;
}

.toast.toast-success { border-left-color: var(--accent-green); }
.toast.toast-error { border-left-color: var(--accent-pink); }
.toast.toast-warning { border-left-color: var(--accent-orange); }

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Confetti Canvas Container */
#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 3000;
  width: 100vw;
  height: 100vh;
}

/* Animations */
@keyframes bounceSmall {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.5); }
  50% { box-shadow: 0 0 0 12px rgba(124, 58, 237, 0); }
}

@keyframes crownFloat {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-6px) rotate(4deg); }
}

.crown-float {
  animation: crownFloat 2s ease-in-out infinite;
  display: inline-block;
}

/* Responsive Grid Helpers */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }

@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .container { padding: 1rem 0.75rem 2.5rem 0.75rem; }
}